diff -r 6811021e3d94 -r 614396cbffbf doc/conf.py
--- a/doc/conf.py	Thu Oct 05 16:46:29 2017 +0300
+++ b/doc/conf.py	Fri Oct 06 17:52:34 2017 +0300
@@ -11,9 +11,6 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
-import os
-
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.